Fluid pump



April 25, 1950 H. c. COLLINS 2,505,386

' FLUID PUMP Filed March 25, 1946 2 Sheets-Sheet 1 Inventor Howard C, Coffins.

WW fim April 25, 1950 H. c. COLLINS 2,505,386

FLUID PUMP Filed March 25, 1946 Q v 2 Sheets-Shet 2 ;/IIIIIIIIA n I L7,, IIIIIIII Inventor ward6. Caz/m.

Patented Apr. 25, 195G UNITED r STATES PATENT OFFICE FLUID PUMP I Howard 0. Collins, Molalla, Oreg.

' Application March 23, 1946, Serial No.'656,649

1 Claim.

This invention relates to an improved fiuid pump of the archimedean screw type, particularly adapted for continuously impelling water as required in mining and irrigating systems.

An object of the invention is to provide an efficient and durable pump of the above kind which may be constructed at low cost.

A more specific object of the invention is to provide an improved arrangement of stufiing boxes and bearings forthe shafts of the screw impeller, whereby to facilitate adjustment of the glands of the stuffing boxes so as to minimize leakage of water from the pump cylinder about such shafts, and whereby to provide for efficient lubrication of the bearings.

The exact nature of the present invention, as well as more specific objects and features thereof, will become apparent from the following description when considered in connection with the accompanying drawings, in which:

Figure 1 is a side elevational view of a fluid pump constructed in accordance with the present invention.

Figure 2 is a top plan view thereof.

Figure 3 is a central vertical longitudinal section taken on line 3--3 of Figure 2.

Figure 4 is a view similar to Figure 3 taken on line 4-4 of Figure 2.

Referring in detail to the drawings, the present pump comprises a casting which includes an elongated pump cylinder 5 having integral top inlet and outlet pipes 6 and I, respectively, near opposite ends thereof, and an integral extension 8 on one end of the cylinder projecting beyond the juncture of the outlet pipe I with the cylinder. The pipes 6 and I diverge upwardly, the inlet pipe 6 being of greater size and capacity than the cylinder 5 and the outlet pipe 1 being of smaller size and capacity than the cylinder 5.

A second extension 9 is detachably joined at In to the other end of the cylinder 5 and projects beyond the juncture of the inlet pipe 6 with said cylinder. An inclined deflector plate II is fitted and welded or otherwise secured in the end of the cylinder 5 adjacent the outlet pipe I for directing the fluid from the cylinder 5 into said outlet pipe. Removable closure caps I2 and I3 are provided on the outer ends of the extensions 8 and 9.

A screw impeller I4 having at least one continuous helical rib I5, is rotatably fitted in and extends substantially from end to end of the cylinder 5. This impeller has axial shafts I6 and I! on the ends thereof that extend axially of the extensions 8 and 9.

Spaced inner and outer stuffing boxes I8 and I 9 for each of the shafts l6 and I! are fitted and secured in the associated extensionso that their glands 20 and 2I are adjustable from adjacent ends thereof. Each extension has a covered top hand hole 22 to facilitate access to the stuffing boxes for adjustment of the glands thereof, the covers of said hand holes being indicated at 23.

Each extension also has a bottom water drain 24 at a point between the stuffing boxes therein. This provides for drainage of water that may pass through the inner stufiing boxes 18 and minimizes the passage of water through the outer stuffing boxes I9, which Water may leak from the pump cylinder about the shafts l6 and I I.

Bearings of the combined radial and thrust type may be provided for the shafts l6 and I I in the outer ends of the outer stuffing boxes III as indicated at 25. The outer stuffing boxes I9 are spaced from the closure caps I2 and I3 so as to provide spaces therebetween for reception of lubricant for the bearings at 25. Means is provided at 26 and 21, respectively, to facilitate in-- troduction of lubricant into and drainage of the same from the spaces between the outer stufiing boxes I9 and the closure caps I2 and I3.

The shaft IT projects through the adjacent closure cap I3 so as to facilitate driving thereof for effecting rotation of the impeller. Motion is preferably transmitted to the shaft I! from a drive shaft 28 through an encased increase-speed gearing 29. A suitable grease retainer 30 may be provided to prevent leakage of lubricant through the cap I3 about the shaft I7.

In operation, the impeller I4 is driven at the desired speed so as to draw the water into cylinder 5 through inlet 6 and forcibly discharge the water from said cylinder into and through the outlet pipe I. Due to the reduced size of the cylinder relative to the inlet and the reduced size of the outlet relative to the cylinder, the pump is adapted to pump the water against a relatively large head of water.

From the foregoing description, it is believed that the construction, operation and advantages of the invention will be readily understood and appreciated by those skilled in the art. Minor changes are contemplated, such as fall within the scope of the invention as claimed.

What I claim is:

A liquid pump comprising an elongated horizontal pump cylinder having upwardly diverging cylindrical top inlet and outlet pipes near opposite ends thereof, an inclined bafile secured in the pump cylinder to direct the liquid from the latter into said outlet pipe, said inlet and outlet pipes being respectively of larger and smaller diameter than said cylinder, a. tubular cylinder extension detachably joined to the end of said cylinder near the inlet pipe, pairs of spaced stufiing boxes in said cylinder extension and in the other end of said cylinder, removable closure caps on said other end of the cylinder and the outer end of said cylinder extension, means to facilitate access to the space between the stuifing boxes of each pair respectively through the top of the cylinder and through the top of the cylin; der extension, a screw impeller rotatably fitted in the cylinder and extending from the inlet pipe to the outlet pipe; said impeller having end shafts extending through said stufiing boxes, one of said shafts extending through the closure can i tai cylinder extension for connection with driying means, and means to drain water from the space between the stufling boxes of each pair.

HOWARD C. COLLINS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS )9 plum-per Name Date 1,102,604 Paulsmeier July 7, 1914 1,136,928 Bodinson Apr. 27, 1915 2,042,641 Victoria June 2, 1936 2,251,020 Murphy July 29, 1941 1,? liOREIGN PATENTS Number gguntry Date 821,362 France Aug. 23, 1937 

